20020221020100 has 288 divisors, whose sum is σ = 67205810552832. Its totient is φ = 4507012800000.

The previous prime is 20020221020077. The next prime is 20020221020123. The reversal of 20020221020100 is 102012202002.

It is an interprime number because it is at equal distance from previous prime (20020221020077) and next prime (20020221020123).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 40264005 + ... + 40758195.

It is an arithmetic number, because the mean of its divisors is an integer number (233353508864).

Almost surely, 2^{20020221020100} is an apocalyptic number.

20020221020100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20020221020100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33602905276416).

20020221020100 is an abundant number, since it is smaller than the sum of its proper divisors (47185589532732).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20020221020100 is a wasteful number, since it uses less digits than its factorization.

20020221020100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494507 (or 494500 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 20020221020100 its reverse (102012202002), we get a palindrome (20122233222102).

The spelling of 20020221020100 in words is "twenty trillion, twenty billion, two hundred twenty-one million, twenty thousand, one hundred".